1 files changed, 41 insertions, 0 deletions
diff --git a/modules/hackage.py b/modules/hackage.py
new file mode 100644
index 0000000..b08299c
--- /dev/null
+++ b/modules/hackage.py
@@ -0,0 +1,41 @@
+# Fedora Developer Shell
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Library General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+# Authors: Yaakov M. Nemoy <ynemoy@redhat.com>
+#
+
+from modules.fetcher import Fetcher
+
+class Hackage(Fetcher):
+    def latest_version(self, pkg):
+        '''download information from hackage to find out the latest version of a package
+        '''
+        hackage_title = compile(r'<title.*?>HackageDB: (.*)-(.*)</title.*?>', DOTALL)
+        site = 'http://hackage.haskell.org/cgi-bin/hackage-scripts/package/' + pkg
+        u = urlopen(site)
+        page = u.read()
+        match = hackage_title.search(page)
+        groups = match.groups()
+        print groups
+        if pkg == groups[0]:
+            return groups[1]
+        else:
+            raise ExecutionException("package does not match package name, can't determine version, sorry")
+
+    def url(self, pkg, ver):
+        '''returns the url for tarball for a hackage package'''
+        return 'http://hackage.haskell.org/packages/archive/' + \
+            pkg + '/' + ver + '/' + pkg + '-' + ver + '.tar.gz'
+